Dislocation-assisted localised pitting corrosion behaviour of Al-Si-Mg-Cu-Mn alloy

被引：16
|
作者：
Kayani, Saif Haider [1 ]
Ha, Heon-Young [1 ]
Cho, Young-Hee [1 ]
Son, Hyeon-Woo [1 ]
Lee, Jung-Moo [1 ]
机构：
[1] Korea Inst Mat Sci, Adv Met Div, Chang Won 51508, South Korea
来源：
CORROSION SCIENCE | 2023年 / 221卷
关键词：
A; Aluminium; B. intermetallic particles; C. pitting corrosion; D. galvanic coupling; E; dislocation; ELECTRON WORK FUNCTION; INTERGRANULAR CORROSION; PRECIPITATION BEHAVIOR; MECHANICAL-PROPERTIES; INTERMETALLIC PHASES; STRAIN-RATE; ALUMINUM; MICROSTRUCTURE; SILICON; METALS;
D O I：
10.1016/j.corsci.2023.111372
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of the electrochemical nature of intermetallic particles (IMPs) and dislocation density on the localised pitting corrosion behaviour of Al-Si-Mg-Cu-Mn alloy was investigated. The Cu-rich Q-phase and Mn-rich & alpha;-AlFeMnSi particles cause the anodic dissolution of adjacent Al, leading to localised pitting. Kelvin-probe atomic force microscopy studies revealed that the high potential of Q-phase and & alpha;-AlFeMnSi particles renders them cathodic. Therefore, micro-galvanic coupling arises between these IMPs and the surrounding Al. High dislocation densities in Al regions adjacent to the IMPs exacerbated localised pitting, which causes stress localisation and deteriorates the overall corrosion resistance of the alloy.
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收藏
页数：10
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